April Weather in South Pasadena, United States

Last updated: June 24, 2025

In April, the average temperature in South Pasadena, United States hovers around 23°C (73°F). Visitors can expect a pleasant range, with minimums dipping to 12°C (54°F) and maximums reaching 28°C (83°F). However, be prepared for some rain, as 60 mm (2.4 in) of precipitation can fall over 7 days, accompanied by an average humidity of 78%.

April Temperature in South Pasadena

In April, in South Pasadena, the average temperature is 23°C (73°F). Maximum temperatures can reach 28°C (83°F), while minimums can drop to as low as 12°C (54°F). It's a great time to visit for those who enjoy mild weather and comfortable outdoor activities.

April Weather in South Pasadena: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in South Pasadena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Pasadena, April typically has an average temperature of 23°C (73°F), with highs reaching up to 28°C (83°F) and lows dropping to around 12°C (54°F).

Data source: Temperature data for South Pasadena generated using information from the Copernicus Climate Change Service.

April Precipitation in South Pasadena

In South Pasadena in April, the precipitation amount is 60 mm (2.4 in) over the course of 7 days.

April Precipitation Trends in South Pasadena

The chart displays monthly precipitation patterns in South Pasadena, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In South Pasadena, April typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 7 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in South Pasadena

In South Pasadena in April, humidity is 78%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace, making outdoor activities a little challenging but still enjoyable for travelers who appreciate a tropical atmosphere.

April Average Humidity in South Pasadena

This chart illustrates the average monthly humidity levels in South Pasadena, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in South Pasadena is approximately 78%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in South Pasadena

In South Pasadena in April, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in South Pasadena.

Maximum UV Index Levels in South Pasadena for April

The chart shows the monthly maximum UV Index (UVI) for South Pasadena in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in South Pasadena typically reaches 11, which falls under the extreme exposure category.

Data source: South Pasadena April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How April Weather in South Pasadena Compares to Other Months

Weather in South Pasadena varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in South Pasadena, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in South Pasadena, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	17°C (62°F)	40 mm (1.6 inches)	82%	high
February Weather	19°C (66°F)	50 mm (2.0 inches)	82%	very high
March Weather	20°C (68°F)	20 mm (0.8 inches)	79%	very high
April Weather	23°C (73°F)	60 mm (2.4 inches)	78%	extreme
May Weather	25°C (77°F)	105 mm (4.1 inches)	76%	extreme
June Weather	27°C (81°F)	174 mm (6.8 inches)	75%	extreme
July Weather	28°C (82°F)	204 mm (8.0 inches)	74%	extreme
August Weather	28°C (83°F)	219 mm (8.6 inches)	74%	extreme
September Weather	27°C (82°F)	143 mm (5.6 inches)	78%	extreme
October Weather	26°C (79°F)	67 mm (2.6 inches)	79%	very high
November Weather	21°C (70°F)	46 mm (1.8 inches)	82%	high
December Weather	19°C (66°F)	66 mm (2.6 inches)	84%	moderate